noun🔗Shareプロピオン酸The compound with the formula CH3CH2COOH, a naturally occurring carboxylic acid with a pungent odor."The strong, unpleasant smell in the cheese aging room was likely due to the presence of propionic acid. "チーズ熟成室の強烈で不快な臭いは、プロピオン酸の存在が原因である可能性が高かった。compoundsubstancechemistryChat with AIVocabulary GamePractice Reading